Analog Devices Inc.

Category: Drivers and Interfaces

The MAX1447/MAX1496/MAX1498 low-power, 3.5- and4.5-digit, analog-to-digital converters (ADCs) with integratedlight-emitting diode (LED) drivers operate from asingle 2.7V to 5.25V power supply. They include aninternal reference, a high-accuracy on-chip oscillator,and a multiplexed LED display driver. An internal chargepump generates the negative supply needed to powerthe integrated input buffers for single-supply operation.The ADC is configurable for either a ±2V or ±200mVinput range and it outputs its conversion results to anLED. The MAX1496 is a 3.5-digit (±1999 count) deviceand the MAX1447/MAX1498 are 4.5-digit (±19,999count) devices.The MAX1447/MAX1496/MAX1498 do not require externalprecision integrating capacitors, autozero capacitors,crystal oscillators, charge pumps, or other circuitryrequired with dual-slope ADCs (commonly used inpanel meter circuits).These devices also feature on-chip buffers for the differentialsignal and reference input, allowing directinterface with high-impedance signal sources. In addition,they use continuous internal offset-calibration andoffer >100dB rejection of 50Hz and 60Hz line noise.Other features include data hold and peak detectionand overrange/underrange detection. The MAX1447features on-demand enhanced offset calibration forimproved offset performance.The MAX1447/MAX1498 are available in a 32-pin, 7mmx 7mm TQFP package and the MAX1496 is available in28-pin SSOP and 28-pin PDIP packages. All devices inthis family operate over the -40°C to +85°C extendedtemperature range.ApplicationsDigital MultimetersDigital Panel MetersDigital VoltmetersHandheld meters

* $21.82 - $19.64